SS is still paid - via revenues from the sales tax. So sales tax will fund SS.
Well, this is good. My main difficulty with the income tax is the degree of intrusion it places on the individual by the Federal government (we're gonna pay the taxes one way or the other, I just prefer the other). I've advocated NRST since my early twenties, over 30 years, since before it was even on the edges of the political screen. I've now seen it go from something that I kind of felt like I was the only one promoting (and getting a reputation for being some kind of hippie political freak for doing so) to being proposed in Congress.
I know a lot of people are afraid of it(the NRST), but I can't see our current system doing anything but becoming unmanageable over the next two decades with total chaos resulting. I don't see the flat tax as any kind of real reform, and it still leaves the intrusiviness of the IRS in place.